Pumps



INVENTOR. RAY L. CARTER ATTNEY R. L. CARTER PUMPS Filed Sept. 2l, 1954March 29, 1955 United States Patent O PUMPS Ray L. Carter, Phoenix, N.Y., assignor to Car-Wel Corporation, Phoenix, N. Y., a corporation ofNew York Application September 21, 1954, Serial No. 457,480

3 Claims. (Cl. 222-333) may be quickly refilled while the contentsthereof are maintained as free as possible from exposure to outsideatmosphere.

The present invention is directed to a pump in which the displacementpiston and cylinder are adapted to be located in the bottom of thereservoir and in which the cylinder support comprises a rigid columnmember aligned with the piston, to provide for accurate displacement ofmeasured quantities of liquid upon each actuation of the pump piston.The invention also has to do with a rigid construction for housing asolenoid for aci' tuating the pump and the adaptation of such a pump forreliable commercial use. Further the submerged pump is so constructed asto displace a minimum of the contents of the reservoir, whereby thereservoir may have a maximum capacity for its size, and will not likelyoverflow when refilled and replaced for use.

The above and other novel features of the invention will appear morefully hereinafter from the following detailed description when taken inconjunction with the accompanying drawings. It is expressly understoodthat the drawings are employed for purposes of illustration only and arenot designed as a definition of the limits of the invention, referencebeing had for this purpose to the appended claims.

In the drawings, wherein like reference characters 1ndicate like parts:

Figure l is a longitudinal sectional View through the pump reservoir andsolenoid chamber;

Figure 2 is a longitudinal section through the solenoid chamber takensubstantially on the line 2 2 of Figure l;

Figure 3 is a transverse section through the submerged column taken onthe line 3-3 of Figure l; and

Figure 4 is a section through the submerged check valve taken on theline 4 4 of Figure l.

In Figure l, there is shown a cup-like solenoid housing member having asubstantially cylindrical wall 12 and an annular integral bottom wall14. Secured to the bottom wall 14 is a pump assembly generally indicatedat 16, comprising an integral plate 18 and depending column member 20,the latter having an integral foot 22 at the lower end thereof. Theplate 18 has an annular marginal flange 24 at the upper edge 26 of whichseats upon the bottom 14 of the housing member 10, and a dependingportion 28 of which is internally threaded to receive a glass reservoir30. The housing member 10 is secured to the plate 18 by screws 32. Thehousing member 10 is provided with a cover plate 34 secured in place byscrews 36. The cover plate on its underside is provided with integralsolenoid mounting members such as 38 and 40 which are adapted to besecured to the arms 42 and 44 of the magnetic yoke 46 of a solenoid.

The column member is of U section and the circular portion thereof isconcentrically disposed around an elongated pump piston rod 48, theupper end of which is enlarged in diameter as at 50 and reciprocateswithin a bushing 52 in the plate 18. The lower end of the pistonreservoir 30 2,705,093 Patented Mar. 29, 1955 rod projects into a pumpcylinder 54, having the general form of a thimble, such cylinder beingmounted in a bore 56 in the foot 22. Inlet ports 58 and 60, the latterbeing plugged as at 62, permit ow of liquid from within the reservoir 30into the pump cylinder 54 at a point somewhat below the lower end of thepiston rod 48 when the rod is in the upward retracted position. Aninclined outlet port 64 connecting with the bottom of the cylinder 54 isprovided with a ball check valve 66, the ball 68 of which seats on anannular shoulder' 70. The port is connected by a tube 72 to an angularport 74 formed in a thickened portion 76 of the plate 18, such porthaving a portion extending radially outward and being provided with aball check valve 78. The outer end of the port is fitted with a suitableadhesive spray nozzle such as 80. The entire pump is adapted to bemounted with the spray nozzle suitably located in conjunction with thematerial to be coated with adhesive.

The plate 18 is also provided with an angular inlet port 82 located in athickened portion 84, so as to admit air into the reservoir tocompensate for the uid contained therein as it is displaced.

The solenoid comprises a T-shaped armature 86 adapted to reciprocatebetween the parallel magnetic arms or pole pieces 42 and 44 of the core46. The stem 88 of the armature is provided with a blade-like extension90 which projects through a slot 92 in the core 46, the lower edge ofwhich blade bears against the head end 94 of the piston rod 48. Thearmature 86 in its upper position engages an abutment 96 formed integralwith the cap 34, and its range of travel downwardly is limited by theengagement of the end faces 98 and 100 of the stem of the armature withblocks 102 and 104 rigidly secured to the transverse portion of the coreor yoke 46. The stem 88 is adapted to project into the winding 106. Thepiston rod is resiliently held in its upper position by a coil spring108 bearing at its lower end against the bushing 52, and at its upperend to the underside of the head 94. Such spring is adapted to lift thepiston rod in its return stroke, and at the same time lift the armaturesolenoid into engagement with the abutment 96.

-In practice, the amount of liquid displaced by the piston rod may becontrolled by altering the length of the rod. Such rod in one form ofthe pump has a diameter of 1A" and by substituting rods of lengthsvarying in increments of 1/16 in length, an accurate and measured amountof liquid may be disposed with each reciprocation of the solenoidarmature and the piston rod within the pump cylinder 54. It will beappreciated that the rod 48 in moving downward, closes the inlet portand thereafter forces the entrapped liquid through the check valves 66and 78 to the spray nozzle 90.

The housing may be rigidly mounted by means of the side boss 110. Withthe assembly rigidly mounted, the may be readily'unscrewed for fillingand replaced. There is provided a seal ring 112 adapted to engage theupper edge of the reservoir 30 when`screwed in place. The piston rod 48and column 20 may be made of brass so as to have equal expansioncharacteristics and the cylinder thimble 54 may be made of stainlesssteel. The arms 42 and 44 of the solenoid will be secured to the members38 and 40 by threaded studs 114 which may be of stainless steel or othernonamagnetic material.

The operation of the pump will readily appear from the foregoingdescription thereof, the pump displacing an accurate measured quantityof liquid from the cylinder S4 each time the solenoid is energized. Theball check valves 66 and 78 act to keep the conduit lled and to permitthe escape through the spray nozzle of only such liquid as is actuallymeasured by the movement of the piston 48.

Although a single embodiment of the invention has been illustrated anddescribed, it is to be understood that the invention is not limitedthereto. As various changes in the construction and arrangement may bemade without departing from the spirit of the invention, as will beapparet to those skilled in the art, reference will be had to theappended claims for a definition of the limits of the invention.

What is claimed is:

1. An electro-magnetically actuated pump comprising a solenoid housingand mounting member having an integral bottom wall, and side casing, acover plate therefor, a solenoid mounted on the under side of said coverplate and depending therefrom within said housing member, said solenoidhaving an armature centrally disposed for vertical movement within saidhousing, stops associated with said solenoid for limiting the verticaltravel of said armature to a lixed range of travel, a pump assemblycomprising a peripherally flanged plate secured to said housing bottomwall and having an integral depending open-sided column centrallydisposed thereon, said column having a pump foot on its lower end, apump cylinder in said foot comprising a member having a cylindricalbore, closed at the bottom and open at the top, the axis of said borebeing in alignment with said armature, a central aperture in said platehaving a guide sleeve, a piston rod extending through said guide sleeveand having at its lower end a piston adapted to reciprocate in saidcylinder, and at its upper end a head adapted to engage the lower end ofsaid armature, a coil compression spring located between said head andsleeve for normally lifting said piston rod and armature to the upperlimit of the travel of said armature, said foot having an inlet portleading to the upper end of said cylinder bore, below the lower end ofsaid piston end, and an outlet port leading from the bottom of saidcylinder bore, a port in said plate having a downwardly directed portioninwardly of and a radial portion emerging at hte peripheral edge of theplate, a conduit connecting said outlet port with the downwardlydirected portion of said plate port, check valves in each of said lastnamed ports, and a vessel adapted to house the column, foot and conduitand be detachably secured to the plate flange.

2. An electro-magnetically actuated pump comprising a solenoid housingand mounting member having an integral bottom wall, and side casing, acover plate therefor, a solenoid mounted on the under side of said coverplate and depending therefrom within said housing member, said solenoidhaving an armature centrally disposed for vertical movement within saidhousing, means for limiting the vertical travel of said armature to alixed range of travel, a pump assembly comprising a peripherally flangedplate secured to the base of said bottom wall and having an integraldepending open-sided column centrally disposed thereon, said columnhaving a pump foot on its lower end, a cylinder bore in said foot closedat the bottom and open at the top, the axis of said bore being inalignment with said armature, a central guide aperture in said plate, apiston rod extending through said guide aperture and having at its lowerend a piston adapted to reciprocate in said cylinder bore, and at itsupper end a head adapted to engage the lower end of said armature, meansfor normally lifting said piston rod and armature to the upper limit ofthe travel of said armature, said foot having an inlet port leading tothe upper end of said cylinder bore, below the lower end of said pistonend, and an outlet port leading from the bottom of said cylinder bore,conduit means extending from said outlet port to the peripheral edge ofsaid plate including a check valve, and a vessel adapted to house thecolumn, foot, and conduit and detachably secured to said plate.

3. An electro-magnetically actuated pump comprising a solenoid housingand mounting member, a solenoid mounted within said housing member, saidsolenoid having an armature centrally disposed for vertical movementwithin said housing, means for limiting the vertical travel of saidarmature to a fixed range of travel, a pump assembly comprising a platesecured to the underside of said housing and having an integraldepending open-sided column centrally disposed thereon, said columnhaving a pump foot on its lower end, a cylinder bore in said foot closedat the bottom and open at the top, the axis of said bore being inalignment with said armature, a central guide aperture in said plate, apiston rod extending through said guide aperture and having at its lowerend a piston adapted to reciprocate in said cylinder bore, and at itsupper end a head adapted to engage the lower end of said armature, acoil compression spring located between said head and guide aperture fornormally lifting said piston rod and armature to the upper limit of thetravel of said armature, said foot having an inlet port leading to theupper end of said cylinder bore, below the lower end of said piston end,and an outlet port leading from the bottom of said cylinder bore, a portin said plate having a downwardly directed portion inwardly of and aradial portion emerging at the peripheral edge of the plate, a conduitconnecting said outlet port with the downwardly directed portion of saidplate port, check valves in each of said last named ports, and a vesseladapted to house the column, foot and conduit and be detachably securedto the plate.

No references cited.

1. AN ELECTRO-MAGNETICALLY ACTUATED PUMP COMPRISING A SOLENOID HOUSINGAND MOUNTING MEMBER HAVING AN INTEGRAL BOTTOM WALL, AND SIDE CASING, ACOVER PLATE THEREFOR, A SOLENOID MOUNTED ON THE UNDER SIDE OF SAID COVERPLATE AND DEPENDING THEREFROM WITHIN SAID HOUSING MEMBER, SAID SOLENOIDHAVING AN AMATURE CENTRALLY DISPOSED FOR VERTICAL MOVEMENT WITHIN SAIDHOUSING, STOPS ASSOCIATED WITH SAID SOLENOID FOR LIMITING THE VERTICALTRAVEL OF SAID ARMATURE TO A FIXED RANGE OF TRAVEL, A PUMP ASSEMBLYCOMPRISING A PERIPHERALLY FLANGED PLATE SECURED TO SAID HOUSING BOTTOMWALL AND HAVING AN INTEGRAL DEPENDING OPEN-SIDED COLUMN CENTRALLYDISPOSED THEREON, SAID COLUMN HAVING A PUMP FOOT ON ITS LOWER END, APUMP CYLINDER IN SAID FOOT COMPRISING A MEMBER HAVING A CYLINDRICALBORE, CLOSED AT THE BOTTOM AND OPEN AT THE TOP, THE AXIS OF SAID BOREBEING IN ALIGNMENT WITH SAID ARMATURE, A CENTRAL APERATURE IN SAID PLATEHAVING A GUIDE SLEEVE, A PISTON ROD EXTENDING THROUGH SAID GUIDE SLEEVEAND HAVING AT ITS LOWER END A PISTON ADAPTED TO RECIPROCATE IN SAIDCYLINDER, AND AT ITS UPPER END A HEAD ADAPTED TO ENGAGE